<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="标题" prop="title">
        <el-input
          v-model="queryParams.title"
          placeholder="请输入标题"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="讲师" prop="teacherId">
        <el-select v-model="queryParams.teacherId" placeholder="选择讲师">
          <el-option
            v-for="item in teacherList"
            :key="item.id"
            :label="item.name"
            :value="item.id"
          />
        </el-select>
      </el-form-item>
      <el-form-item label="类别" prop="subjectId">
        <el-select v-model="queryParams.subjectId" placeholder="选择类别">
          <el-option
            v-for="item in subjectList"
            :key="item.id"
            :label="item.title"
            :value="item.id"
          />
        </el-select>
      </el-form-item>
      <el-form-item label="最低价格" prop="beginPrice">
        <el-input
          v-model="queryParams['params[beginPrice]']"
          placeholder="请输入最低价格"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="最高价格" prop="endPrice">
        <el-input
          v-model="queryParams['params[endPrice]']"
          placeholder="请输入最高价格"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="状态" prop="status">
        <el-select v-model="queryParams.status" placeholder="请选择状态" clearable>
          <el-option
            v-for="dict in dict.type.edu_course_status"
            :key="dict.value"
            :label="dict.label"
            :value="dict.value"
          />
        </el-select>
      </el-form-item>
      <el-form-item label="创建时间">
        <el-date-picker
          v-model="daterangeGmtCreate"
          style="width: 240px"
          value-format="yyyy-MM-dd"
          type="daterange"
          range-separator="-"
          start-placeholder="开始日期"
          end-placeholder="结束日期"
        ></el-date-picker>
      </el-form-item>
      <el-form-item label="更新时间">
        <el-date-picker
          v-model="daterangeGmtModified"
          style="width: 240px"
          value-format="yyyy-MM-dd"
          type="daterange"
          range-separator="-"
          start-placeholder="开始日期"
          end-placeholder="结束日期"
        ></el-date-picker>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['edu:course:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          plain
          icon="el-icon-edit"
          size="mini"
          :disabled="single"
          @click="handleUpdate"
          v-hasPermi="['edu:course:edit']"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          plain
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['edu:course:remove']"
        >删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          plain
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
          v-hasPermi="['edu:course:export']"
        >导出</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="courseList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="标题" align="center" prop="title" show-overflow-tooltip>
        <template slot-scope="scope">
          <router-link :to="'/edu/course-data/index/' + scope.row.id" class="link-type">
            <span>{{ scope.row.title }}</span>
          </router-link>
        </template>
      </el-table-column>
      <el-table-column label="讲师" align="center" prop="teacherName" />
      <el-table-column label="类别" align="center" prop="subjectName" />
      <el-table-column label="销售价格" align="center" prop="price" />
      <el-table-column label="总课时" align="center" prop="lessonNum" />
      <el-table-column label="封面图" align="center" prop="cover" width="100">
        <template slot-scope="scope">
          <image-preview :src="scope.row.cover" :width="50" :height="50"/>
        </template>
      </el-table-column>
      <el-table-column label="销量" align="center" prop="buyCount" />
      <el-table-column label="浏览数" align="center" prop="viewCount" />
      <el-table-column label="状态" align="center" prop="status">
        <template slot-scope="scope">
          <dict-tag :options="dict.type.edu_course_status" :value="scope.row.status"/>
        </template>
      </el-table-column>
      <el-table-column label="创建时间" align="center" prop="gmtCreate" width="180">
        <template slot-scope="scope">
          <span>{{ parseTime(scope.row.gmtCreate, '{y}-{m}-{d}') }}</span>
        </template>
      </el-table-column>
      <el-table-column label="更新时间" align="center" prop="gmtModified" width="180">
        <template slot-scope="scope">
          <span>{{ parseTime(scope.row.gmtModified, '{y}-{m}-{d}') }}</span>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            v-if="scope.row.status === 'Draft'"
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleRelease(scope.row)"
            v-hasPermi="['edu:course:edit']"
          >发布</el-button>
          <el-button
            v-if="scope.row.status === 'Normal'"
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleRelease(scope.row)"
            v-hasPermi="['edu:course:edit']"
          >下架</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['edu:course:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['edu:course:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改课程对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="标题" prop="title">
          <el-input v-model="form.title" placeholder="请输入标题" />
        </el-form-item>
        <el-form-item label="讲师" prop="teacherId">
          <el-select v-model="form.teacherId" placeholder="选择讲师">
            <el-option
              v-for="item in teacherList"
              :key="item.id"
              :label="item.name"
              :value="item.id"
            />
          </el-select>
        </el-form-item>
        <el-form-item label="类别" prop="subjectId">
          <el-select v-model="form.subjectId" placeholder="选择类别">
            <el-option
              v-for="item in subjectList"
              :key="item.id"
              :label="item.title"
              :value="item.id"
            />
          </el-select>
        </el-form-item>
        <el-form-item label="简介" prop="description">
          <editor v-model="form.description" :min-height="192"/>
        </el-form-item>
        <el-form-item label="销售价格" prop="price">
          <el-input v-model="form.price" placeholder="请输入销售价格" />
        </el-form-item>
        <el-form-item label="总课时" prop="lessonNum">
          <el-input v-model="form.lessonNum" placeholder="请输入总课时" />
        </el-form-item>
        <el-form-item label="封面图" prop="cover">
          <image-upload v-model="form.cover"/>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listCourse, getCourse, delCourse, addCourse, updateCourse, releaseCourse } from "@/api/edu/course";
import { listSubject } from "@/api/edu/subject";
import { listTeacher } from "@/api/edu/teacher";

export default {
  name: "Course",
  dicts: ['edu_course_status'],
  data() {
    return {
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 课程表格数据
      courseList: [],
      // 课程类别数据
      subjectList: [],
      // 讲师数据
      teacherList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 封面图时间范围
      daterangeGmtCreate: [],
      // 封面图时间范围
      daterangeGmtModified: [],
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        teacherId: null,
        subjectId: null,
        title: null,
        'params[beginPrice]': null,
        'params[endPrice]': null,
        status: null,
        gmtCreate: null,
        gmtModified: null
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        teacherId: [
          { required: true, message: "讲师不能为空", trigger: "change" }
        ],
        subjectId: [
          { required: true, message: "类别不能为空", trigger: "change" }
        ],
        title: [
          { required: true, message: "标题不能为空", trigger: "blur" }
        ],
        price: [
          { required: true, message: "销售价格不能为空", trigger: "blur" }
        ],
        lessonNum: [
          { required: true, message: "总课时不能为空", trigger: "blur" }
        ],
        cover: [
          { required: true, message: "封面图不能为空", trigger: "blur" }
        ],
        description: [
          { required: true, message: "课程简介不能为空", trigger: "blur" }
        ],
      }
    };
  },
  created() {
    this.getList();
    this.getTeacherList();
    this.getSubjectList();
  },
  methods: {
    /** 查询课程列表 */
    getList() {
      this.loading = true;
      this.queryParams.params = {};
      if (null != this.daterangeGmtCreate && '' != this.daterangeGmtCreate) {
        this.queryParams.params["beginGmtCreate"] = this.daterangeGmtCreate[0];
        this.queryParams.params["endGmtCreate"] = this.daterangeGmtCreate[1];
      }
      if (null != this.daterangeGmtModified && '' != this.daterangeGmtModified) {
        this.queryParams.params["beginGmtModified"] = this.daterangeGmtModified[0];
        this.queryParams.params["endGmtModified"] = this.daterangeGmtModified[1];
      }
      listCourse(this.queryParams).then(response => {
        this.courseList = response.rows;
        this.total = response.total;
        this.loading = false;
      });
    },
    /** 查询讲师列表 */
    getTeacherList() {
      listTeacher().then(response => {
        this.teacherList = response.rows
      })
    },
    /** 查询类别列表 */
    getSubjectList() {
      listSubject().then(response => {
        this.subjectList = response.data
      })
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        id: null,
        teacherId: null,
        subjectId: null,
        subjectParentId: null,
        title: null,
        price: null,
        lessonNum: null,
        cover: null,
        buyCount: null,
        viewCount: null,
        version: null,
        status: null,
        isDeleted: null,
        gmtCreate: null,
        gmtModified: null
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1;
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.daterangeGmtCreate = [];
      this.daterangeGmtModified = [];
      this.queryParams["params[beginPrice]"] = null;
      this.queryParams["params[endPrice]"] = null;
      this.resetForm("queryForm");
      this.handleQuery();
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.id)
      this.single = selection.length!==1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset();
      this.open = true;
      this.title = "添加课程";
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset();
      const id = row.id || this.ids
      getCourse(id).then(response => {
        this.form = response.data;
        this.open = true;
        this.title = "修改课程";
      });
    },
    /** 发布或下架课程 */
    handleRelease(row) {
      let tip;
      if (row.status === 'Normal') {
        tip = '是否确认下架标题为"' + row.title + '"的课程?';
      } else {
        tip = '是否确认发布标题为"' + row.title + '"的课程?';
      }
      this.$modal.confirm(tip).then(function() {
        return releaseCourse(row.id, row.status);
      }).then(() => {
        this.getList();
        if (row.status === 'Normal') {
          this.$modal.msgSuccess("下架成功");
        } else {
          this.$modal.msgSuccess("发布成功");
        }
      }).catch(() => {});
    },
    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.id != null) {
            let form = this.form
            form.gmtModified = null
            updateCourse(form).then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              this.getList();
            });
          } else {
            addCourse(this.form).then(response => {
              this.$modal.msgSuccess("新增成功");
              this.open = false;
              this.getList();
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const ids = row.id || this.ids;
      this.$modal.confirm('是否确认删除课程编号为"' + ids + '"的数据项？').then(function() {
        return delCourse(ids);
      }).then(() => {
        this.getList();
        this.$modal.msgSuccess("删除成功");
      }).catch(() => {});
    },
    /** 导出按钮操作 */
    handleExport() {
      this.download('edu/course/export', {
        ...this.queryParams
      }, `course_${new Date().getTime()}.xlsx`)
    }
  }
};
</script>
<style lang="css"> .el-tooltip__popper{ max-width:30% } </style>
